WO2012095479A1 - Vis - Google Patents

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Publication number
WO2012095479A1
WO2012095479A1 PCT/EP2012/050415 EP2012050415W WO2012095479A1 WO 2012095479 A1 WO2012095479 A1 WO 2012095479A1 EP 2012050415 W EP2012050415 W EP 2012050415W WO 2012095479 A1 WO2012095479 A1 WO 2012095479A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw
cutting edges
angle
drill head
longitudinal axis
Prior art date
Application number
PCT/EP2012/050415
Other languages
German (de)
English (en)
Inventor
Günter Stiebitz
Original Assignee
Swg Schraubenwerk Gaisbach Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Swg Schraubenwerk Gaisbach Gmbh filed Critical Swg Schraubenwerk Gaisbach Gmbh
Priority to DK12700280.6T priority Critical patent/DK2663779T3/en
Priority to EP12700280.6A priority patent/EP2663779B1/fr
Priority to PL12700280T priority patent/PL2663779T3/pl
Publication of WO2012095479A1 publication Critical patent/WO2012095479A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0021—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being metal, e.g. sheet-metal or aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0084—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by geometric details of the tip
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
    • F16B25/103—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a drilling screw-point, i.e. with a cutting and material removing action

Definitions

  • the invention relates to a self-drilling and thread-forming screw.
  • a known self-tapping and thread-forming screw of this type has a drill head which includes two cutting edges extending parallel to the transverse dimension. These cutting edges are offset from each other in a conventional manner. In the side view of the screw, they have a point angle. The cutting edges extend straight from a web-like tip of the screw to their radially outer end (DE 1625417).
  • a self-drilling screw which has at its drill bit a first edge extending from the longitudinal axis of the screw, which extends over approximately half the radius of the drill bit.
  • the drill bit On the diametrically opposite side, the drill bit has a second cutting edge, which extends from about half of the radius of the drill bit to the outside (DE 10 2007 000848 A1). Both cutting edges have approximately the same angle with respect to the longitudinal axis.
  • the invention is based on the object to provide a screw that has a better drilling behavior of the drill bit and suitable for both hand-screwed and automatic screwed is.
  • the proposed by the invention screw thus has a drill head, the cutting edges are no longer along a straight line, but are angled, so that in the region of the tip of the screw, the cutting edges fall more sharply than in the remaining area. As a result, first a smaller hole is produced with a larger peripheral speed and later this leading hole is then drilled with the outer portion of the cutting edge.
  • the screw proposed by the invention contains a correct tip, so that the screw against lateral slippage is also secured when it is applied only at low pressure. It has been found to be particularly useful that the angle between the longitudinal axis and the cutting edge in the first section is between about 40 and 50 °. This leads to a point angle of roughly 90 °, a value which is significantly smaller than the point angle in the known self-drilling screws.
  • the angle between the longitudinal axis of the screw and the cutting edge in the mentioned second section is in a range between about 60 and 80 °.
  • the drill head has in the longitudinal direction of the screw extending minor cutting edges, which adjoin the cutting edges. These ensure that the edges of the generated hole are neatly smoothed. This leads to a better shaping of the thread through the thread adjacent to the drill head.
  • the secondary cutting edges are formed by the cutting edge of two an angle of about 25 to 35 ° einproofder surfaces. One of these surfaces is the radial boundary wall of the drill head, and the other surface is the surface lying in the direction of rotation in front of the cutting edge, which may be formed as a groove extending in the longitudinal direction of the drill head.
  • the axial extent of the drill head corresponds approximately to twice to three times the pitch of the screw thread.
  • the axial extent of the drill head determines the thickness of the sheet into which the screw can be screwed. Because as soon as the thread engages in the hole, the hole must be made completely, since the feed of the screw produced by the thread is greater than the feed, which is possible during drilling.
  • the transverse extent of the drill head in the direction of the cutting edges is at least as great as the diameter of the shaft and smaller than the tip diameter of the screw thread.
  • the transverse extent of the drill head is preferably significantly smaller than the diameter of the shaft and is for example in the range of two thirds of the diameter of the shaft. As a result, sufficient space is created to carry the resulting chips during drilling out of the borehole out.
  • the secondary cutting edges run parallel to the longitudinal direction of the screw.
  • the radially outer surfaces of the drill head preferably extend parallel to the longitudinal direction of the screw, so that the Bohrköpf looks at least approximately cylindrical.
  • the distance between the radially outer ends of the outgoing from the tip portions of the cutting edges corresponds to each other between about 70% and about 80% of the transverse extent of the drill head
  • the angle between the longitudinal axis of the screw and the cutting edge in the second section is greater by approximately 25 ° than the angle between the longitudinal axis of the screw and the cutting edge in the first section.
  • Figure 1 is a side view of a screw according to the invention.
  • Figure 2 is a side view of the screw from a 90 ° offset direction
  • FIG. 5 shows, in a scale corresponding to FIG. 4, an end view of the drill head of the screw.
  • the screw shown in Figures 1 and 2 includes a screw shaft 1, which is provided with a thread 2.
  • a screw head 3 is formed, which has a hexagonal shape. The screw head is used to attach a tool to turn the screw.
  • a drill head 4 is formed, which is made for example by cold working.
  • the outer sides of the drill head 4, as shown in Figure 1, are parallel to the longitudinal axis of the screw. The same applies to the outer boundary lines of the drill head 4 to be seen in FIG.
  • FIG. 3 now shows a cross section through the drill head 4 of the screw.
  • the screwing is shown by the arrow 5.
  • two secondary cutting edges 6 running parallel to the longitudinal direction of the screw are formed.
  • the secondary cutting edges 6 are formed by the cutting edge of the outer surface 7 of the drill head 4 on the one hand and an inner surface 8 of the drill head 4. These two surfaces 7 and 8 include an angle 9 of about 25 to 35 °.
  • the tip 10 of the drill head 4 is formed as a real tip, so that the screw is centered when fitting through the top 10 and secured against lateral deflection.
  • FIG. 4 and FIG. First to the figure 4.
  • the cutting edges 1 1 of the drill head 4 can be seen.
  • first portion 1 1 a which begins at the top 10, the cutting edges 1 1 extend at an angle to the longitudinal axis, which is in the range of 40 to 50 °.
  • first rectilinear section 1 1 a is followed by a section 1 1 b, in which the cutting edges 1 1 extend flatter, so include with the longitudinal axis of the screw a larger angle, which is for example in the range of about 60 to 80 °.
  • the radial extent of the first portion 1 1 a is about 60% of the radius of the drill head or the hole to be produced, so that the radial extent of the second portion 1 1 b is about 40%.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Drilling Tools (AREA)

Abstract

L'invention concerne une vis autoforante et formatrice de filets qui comporte, à l'extrémité avant de la tige de vis (1), une tête perceuse (4) comprenant deux arêtes de coupe (11) s'étendant transversalement à l'axe longitudinal de la vis. Les arêtes de coupe (11) partent d'une pointe de vis (10). Dans une première partie (11a) partant de la pointe de vis, les arêtes de coupe forment l'une avec l'autre un premier angle. Une partie (11b) dans laquelle les arêtes de coupe forment l'une avec l'autre un angle plus grand que dans la première région se raccorde à cette première partie (11a). Vues de côté, les arêtes de coupe s'étendent le long de deux parties formant un angle l'une avec l'autre.
PCT/EP2012/050415 2011-01-14 2012-01-12 Vis WO2012095479A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DK12700280.6T DK2663779T3 (en) 2011-01-14 2012-01-12 Screw
EP12700280.6A EP2663779B1 (fr) 2011-01-14 2012-01-12 Vis
PL12700280T PL2663779T3 (pl) 2011-01-14 2012-01-12 Śruba

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011002723.8 2011-01-14
DE102011002723A DE102011002723A1 (de) 2011-01-14 2011-01-14 Schraube

Publications (1)

Publication Number Publication Date
WO2012095479A1 true WO2012095479A1 (fr) 2012-07-19

Family

ID=45478329

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/050415 WO2012095479A1 (fr) 2011-01-14 2012-01-12 Vis

Country Status (5)

Country Link
EP (1) EP2663779B1 (fr)
DE (1) DE102011002723A1 (fr)
DK (1) DK2663779T3 (fr)
PL (1) PL2663779T3 (fr)
WO (1) WO2012095479A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2752588A1 (fr) * 2013-01-02 2014-07-09 Shu-Chin Huang Extrémité de foret plat d'une vis
WO2020213482A1 (fr) * 2019-04-17 2020-10-22 三菱マテリアル株式会社 Mèche
CN112204266A (zh) * 2018-04-01 2021-01-08 A·陈 自钻螺栓和螺母

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1625417A1 (de) 1966-09-13 1970-08-13 Parker Kalon Corp Schraube und Verfahren zu ihrer Herstellung
US4878788A (en) 1988-08-04 1989-11-07 Kabushiki Kaisha Kobe Seiko Sho Drill for drilling a thin plate
GB2289317A (en) 1994-05-11 1995-11-15 Miyagawa Kinzoku Kogyo Drill screw
JPH10281125A (ja) 1997-03-31 1998-10-20 Nitto Seiko Co Ltd セルフドリリングタッピンねじ及びその製造方法
DE102007000848A1 (de) 2007-10-11 2009-04-23 Hilti Aktiengesellschaft Selbstbohrschraube

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739682A (en) * 1969-04-14 1973-06-19 Olympic Fastening Syst Inc Self drilling, reaming and tapping screw
GB2100628B (en) * 1981-06-25 1985-04-11 Shinjo Seisakusho Yk A drill screw
US5046905A (en) * 1989-07-06 1991-09-10 Emhart Inc. Winged drill screw
DE29706749U1 (de) * 1997-04-15 1998-08-13 A-Z Ausrüstung und Zubehör GmbH & Co. KG, 45525 Hattingen Selbstbohrendes und gewindeformendes Verbindungselement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1625417A1 (de) 1966-09-13 1970-08-13 Parker Kalon Corp Schraube und Verfahren zu ihrer Herstellung
US4878788A (en) 1988-08-04 1989-11-07 Kabushiki Kaisha Kobe Seiko Sho Drill for drilling a thin plate
GB2289317A (en) 1994-05-11 1995-11-15 Miyagawa Kinzoku Kogyo Drill screw
JPH10281125A (ja) 1997-03-31 1998-10-20 Nitto Seiko Co Ltd セルフドリリングタッピンねじ及びその製造方法
DE102007000848A1 (de) 2007-10-11 2009-04-23 Hilti Aktiengesellschaft Selbstbohrschraube

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2752588A1 (fr) * 2013-01-02 2014-07-09 Shu-Chin Huang Extrémité de foret plat d'une vis
CN112204266A (zh) * 2018-04-01 2021-01-08 A·陈 自钻螺栓和螺母
EP3775585A4 (fr) * 2018-04-01 2021-12-22 Chen, Ami Boulon autoforeur et écrou
US11867215B2 (en) 2018-04-01 2024-01-09 Ami CHEN Self drilling bolt and nut
WO2020213482A1 (fr) * 2019-04-17 2020-10-22 三菱マテリアル株式会社 Mèche
JP2020175465A (ja) * 2019-04-17 2020-10-29 三菱マテリアル株式会社 ドリル
JP7375329B2 (ja) 2019-04-17 2023-11-08 三菱マテリアル株式会社 ドリル
US11992887B2 (en) 2019-04-17 2024-05-28 Mitsubishi Materials Corporation Drill

Also Published As

Publication number Publication date
PL2663779T3 (pl) 2018-12-31
EP2663779B1 (fr) 2018-07-25
EP2663779A1 (fr) 2013-11-20
DE102011002723A1 (de) 2012-07-19
DK2663779T3 (en) 2018-11-19

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